Operation Ivy

English: Operation Ivy was a series of two nuclear tests done by the United States in 1952. Ivy Mike was the first test of a thermonuclear weapon, detonated on October 31/November 1, 1952 by the United States. It had a yield of 10 megatons. Ivy King was a test of a very high yield pure-fission bomb, detonated on November 15, 1952, with a yield of 500 kilotons.

Ivy Mike (31 Oct 1952)

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  The Ivy Mike "Sausage" device before detonation.
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  Ivy Mike shot cab, outside view
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  Ivy Mike fireball.
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  Ivy Mike fireball.
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  Ivy Mike mushroom cloud.
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  Ivy Mike mushroom cloud.
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  Later cloud development.
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  Enewetak Atoll, Marshall Islands, before detonation. Note island of Eugelab at left.
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  Enewetak Atoll, Marshall Islands, after detonation. Note crater at left.
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  Fallout map

Ivy King (15 Nov 1952)

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  Ivy King mushroom cloud.
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  Ivy King, from a distance.